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/*******************************************************************************
* Copyright (c) 2004, 2013 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.osgi.storage.url;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import org.eclipse.osgi.internal.messages.Msg;
import org.eclipse.osgi.storage.bundlefile.BundleEntry;
import org.eclipse.osgi.util.NLS;
/**
* URLConnection for BundleClassLoader resources.
*/
public class BundleURLConnection extends URLConnection {
/** BundleEntry that the URL is associated. */
protected final BundleEntry bundleEntry;
/** InputStream for this URLConnection. */
protected InputStream in;
/** content type for this URLConnection */
protected String contentType;
/**
* Constructor for a BundleClassLoader resource URLConnection.
*
* @param url URL for this URLConnection.
* @param bundleEntry BundleEntry that the URLConnection is associated.
*/
public BundleURLConnection(URL url, BundleEntry bundleEntry) {
super(url);
this.bundleEntry = bundleEntry;
this.in = null;
this.contentType = null;
}
public synchronized void connect() throws IOException {
if (!connected) {
if (bundleEntry != null) {
in = bundleEntry.getInputStream();
connected = true;
} else {
throw new IOException(NLS.bind(Msg.RESOURCE_NOT_FOUND_EXCEPTION, url));
}
}
}
public int getContentLength() {
return ((int) bundleEntry.getSize());
}
public String getContentType() {
if (contentType == null) {
contentType = guessContentTypeFromName(bundleEntry.getName());
if (contentType == null) {
if (!connected) {
try {
connect();
} catch (IOException e) {
return (null);
}
}
try {
if (in.markSupported())
contentType = guessContentTypeFromStream(in);
} catch (IOException e) {
// do nothing
}
}
}
return (contentType);
}
public boolean getDoInput() {
return (true);
}
public boolean getDoOutput() {
return (false);
}
public InputStream getInputStream() throws IOException {
if (!connected) {
connect();
}
return (in);
}
public long getLastModified() {
long lastModified = bundleEntry.getTime();
if (lastModified == -1) {
return (0);
}
return (lastModified);
}
/**
* Converts the URL to a common local URL protocol (i.e file: or jar: protocol)
* @return the local URL using a common local protocol
*/
public URL getLocalURL() {
return bundleEntry.getLocalURL();
}
/**
* Converts the URL to a URL that uses the file: protocol. The content of this
* URL may be downloaded or extracted onto the local filesystem to create a file URL.
* @return the local URL that uses the file: protocol
*/
public URL getFileURL() {
return bundleEntry.getFileURL();
}
}
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